Customer Lifetime Value (CLV)
Definition
The total revenue a business can expect from a single customer account throughout the business relationship.
Example Use Case
A subscription service calculates that their average customer stays for 2.5 years and spends $1,200 total.
Customer lifetime value estimates the total revenue a customer will generate over the whole relationship, not just the first purchase. It changes what you can rationally afford to spend on acquisition: if a subscriber stays for years, a higher upfront cost is justified than if they buy once.
The simplest useful calculation multiplies average order value by purchase frequency and expected lifespan. Each input is an assumption, so the output is a planning estimate rather than a precise figure — and the assumptions deserve to be written down, because they are what you are actually betting on.
CLV is most actionable as a comparison tool. Segmenting by acquisition channel or first product often reveals that customers acquired one way are worth far more than another, which should redirect budget even when the headline acquisition cost looks similar. Pair it with attribution to see which channels bring durable customers rather than cheap ones.
